Happy Thanksgiving - instead of eating a Turkey, I started with the installation of my DAS rollbar. I picked it up used and found out that it did not come with the 2 bolts for the lower
crossbar. The installation instructions specify AN 7/16n x 31/32" as the size. What does the 'n' stand for? The only sizes I found on McMaster-Carr are 7/16"-14 ... and 7/16"-20 ... There was not any 'n' ...